I was checking Daragh O'toole's website (don't ask me why, I don't know) and then I noticed that he removed all mentions to Celtic Woman.
This is the page now, with no mention to Celtic Woman at all:
http://daraghotoole.ie/about/And this is the same page in August 2022, where he mentions his work with Celtic Woman:
https://web.archive.org/web/20220813054829/http://daraghotoole.ie/about/His departure of the group's musical direction would very much explain why they had to cancel this year tour in order to give a new musical director space to work on new material. And as well the lack of a direct reason for us, the fans, about it since it is a very internal matter.
Detective Granuaile at your disposal.